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2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

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5818732 No.5818732 [Reply] [Original]

Thought of this while shitting today, there's no way I'm the first person to consider it.

Why doesn't it work?

>> No.5818737

>>5818732
Water flows out of the bottom. The pressure of the column of water on the left will force water on the right to flow outward until the heights equalize.

>> No.5818738

because fluid is fluid, so the pressures on the left and right chambers would balance out, ejecting enough water until it does.
also you are

>> No.5818743

at least make up a better lie. this pic is old as fuck

>> No.5818751

>>5818738
So what if you rigged up some valve to only let ping pong balls through without water?

>> No.5818756

>>5818751
without water what? without it normalizing the pressures? you aren't going to get a positive net return, it's literally impossible.

>> No.5818758

>>5818751
If it was mechanically perfect (impossible ATM) then essentially you'd be converting structural integrity into energy.

So, isn't practical or plausible now (and perpetual motion will likely never be), but interesting thought.

>> No.5818759

>>5818751
Two possibilities:
1) it is pushed open by the balls, and therefore exerts a force on the ping pong balls sufficient to stop their movement, or
2) it takes an external power source, making the whole thing net-energy-consuming.

>> No.5818789

How do you suppose you keep the left side water from forcing the right side water to overflow until they are both at the same level?

>> No.5818876

guys guys guys

for the pressure problem, what if the shallow side was much wider and the tall side was narrower? then the equilibrium position would have water higher on one side

>> No.5818895

>>5818876
also just thought id say gravity will effect both side equally, the only thing spinning it with be buoyancy forces. There's a good reason your necklace doesn't spin around and around, gravity probably wont miss the other side

>> No.5818905

>>5818732
This has been posted before. The energy necessary to displace the ping pong balls is equal to the energy of the buoyant force of the balls.

>> No.5818960

The real reason this doesn't work but seems like it would is because of how much it resembles a yin yang.

>> No.5818987

>>5818876
>>5818895
What is Archimedes principle?
Volume does not affect pressure since your system isn't closed.

>> No.5819051

>>5818732
How exactly are you going to keep the water in connected chambers at two different levels? Water seeks its own level, i.e. what's happening in your illustration insofar as the differentiated water levels simply isn't possible.

>> No.5819669

>>5818751
As the balls push through the valve they need to push or dislocate water which takes energy.
This energy would then push the ball upward, but since energy is lost (because open system) the water doesn't have enough force to dislocate itself so that the next ball would get through the valve.
Since the balls are connected by a wire, the ball stuck at the valve also pulls down the ball inside the body of water, stopping the circulation.

>> No.5819679 [DELETED] 
File: 196 KB, 800x600, 965682.jpg [View same] [iqdb] [saucenao] [google]
5819679

This is now a troll science thread

>> No.5819681
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5819681

>> No.5819702

it takes the same amount of energy to force a ball under the water as is released by the water forcing the ball to the surface.

>> No.5819709

>>5819681
It's called Fucking drafting.

>> No.5819710

>>5818732
no, just no.

>> No.5819711
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5819711

>> No.5819713
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5819713

>>5819709

>> No.5819730

>>5818732
The kinetic energy due to buoyancy would not be enough to overcome gravity.

>> No.5819749
File: 103 KB, 680x309, trullzlulz.png [View same] [iqdb] [saucenao] [google]
5819749

>> No.5819758
File: 53 KB, 500x720, rigid_body.png [View same] [iqdb] [saucenao] [google]
5819758

>>5819749
Nope

>> No.5819773

>>5819711
This would work if it caused a shift in the centre of gravity, wouldn't it?

>> No.5819781
File: 17 KB, 300x400, 400pennyfarthing2.jpg [View same] [iqdb] [saucenao] [google]
5819781

>>5819773
course it wouldnt work you fucking moron.
did people on old-style penny farthings constantly have to cycle uphill??
no!
so fuck off

>> No.5819836

>>5819773
Its centre of mass would still be above its base, where would the forward force come from?

>> No.5819853

>>5819773
To convert falling into forward velocity, the potential energy provided by your height has to diminish in the process, ie your center of mass has to sink. That doesn't happen here.

>> No.5819856

http://www.google.com/recaptcha/api/image?c=03AHJ_VusbDJ9kEotDR4Spu9gCNlqEyIqlfAJvDh7ZrScoBWFhJt9LcDQ83a5IRQkotX65SQW8bGnSta_cjAbX6mr8gfh-76VkPCxHx9txb5w0OncEtmYTvmKtxz3qO2ywNT9NAiMv5pjUaO2IEXcb-cgilT8AsIL1s8bpjYJCiwqqoE66Lnn9tEc

>> No.5819940

>>5818732
Balls replace mass of water equal to their volume

>> No.5819972

Because water pressure doesn't work that way.

You can actually test this yourself. Go get a pipe shaped like a u. Try and fill it up so that one side is filled up more than the other. You'll find that the water level will ALWAYS be equal on both sides, it just wouldn't work.

>> No.5819987

>>5819749

The poke just propagates through the stick.

>> No.5819989 [DELETED] 

>>5818737
What if the entry was sealed with tiny nanomachines that adapt their shape to let the balls pass without leaking too much water?

>> No.5820002

>>5819989
Those nanomachines require energy to function

>> No.5820018

>>5820002
Yes but is it necessarily greater than the energy derived? All they have to do is move themselves horizontally and then interlock physically.

>> No.5820023

>>5820018
Since conservation of energy works then yeah they probably will.

>> No.5820030

>>5820018
While moving horizonally they will have to push the balls underwater, which means pushing water out of the way.
The ball floats to the surface because the water is denser than the ball, due to which the water "falls" back to the same place where it was before the ball was forced in.
The water displaces the ball using the energy gained from the nanomachines pushing the ball underwater.

>> No.5820036

>>5819702

This is the real answer. This thread is full of idiots.

>> No.5820037

>>5820030
Sorry if I'm being an idiot but I don't see why the nanomachines have to push. The combined upward force of 10 balls isn't enough to pull one ball under the water?

>> No.5820041

>>5820037
They've also got to stop the rest of the water sloshing out and that's quite a bit of water.

>> No.5820048

>>5820037
If the 10 balls pull one ball underwater to get one ball out of the water there is no change in energy, and any friction or other loss of energy causes the "wheel" to stop.

>> No.5820047

>>5820041
I guess it depends how fast they operate. A rigorous disproof would probably involve calculating how fast the water sloshes out vs how fast they can move and lock.

>> No.5820071

>>5820048
I don't understand what you're saying but it seems like the upward force on the right would be greater than the buoyant force on the left.